Control scheme for a reverse osmosis system using a hydraulic energy management integration system

摘要

The present invention relates to a reverse osmosis system and a method of operating the same, comprising a first pump (28) for receiving a feed fluid at a first pressure and for pressurizing the feed fluid at a second pressure higher than the first pressure, ), A pump unit 112, and a motor 116. The hydraulic energy management system (HEMI) The concentrated water output fluid communicates with the turbine section. The reverse osmosis system also includes a second pump 20 and a controller for controlling the motor to suppress rotation of the HEMI while the first pump pressurizes the feed fluid to a second pressure. The controller 140 increases the HEMI speed to increase the pressure of the supply fluid beyond the second pressure and controls the second pump when the supply fluid reaches the second pressure at the raw water input to reduce the pressure of the supply fluid to the third Increase with pressure. The controller reduces the HEMI velocity after the third pressure and changes the HEMI velocity based on the membrane pressure.